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Enhanced Cryogenic Magnetocaloric Effect Induced by Small Size GdNi5 Nanoparticles
J. Li; S. Ma; H. Wang; W. J. Gong; J. J. Jiang; S. J. Li; Y. Wang; D. Y. Geng; Z. D. Zhang
2014
Source PublicationJournal of Materials Science & Technology
ISSN1005-0302
Volume30Issue:10Pages:973-978
AbstractGdNi5 nanoparticles and GdNi5/Gd2O3 nanocapsules (with GdNi5 core and Gd2O3 shell) were prepared by arc-discharge technique under different hydrogen partial pressure. The GdNi5 nanoparticles show irregular spherical shape and have a size distribution of 10-50 nm with an average diameter of 15 nm. In comparison, the GdNi5/Gd2O3 nanocapsules present spherical morphology and show a size distribution of 10-100 nm with an average diameter of 60 nm. Under a magnetic field change of 50 kOe, the maximum magnetic entropy change of GdNi5 nanoparticles is 13.5 J/(kg K) at 5 K, while the corresponding value of the GdNi5/Gd2O3 nanocapsuels is only 5.7 J/(kg K) at 31 K. The origin of the large magnetic entropy change of GdNi5 nanoparticles is ascribed to its high atomic moments and small anisotropy energy barrier induced by its small particle size.
description.department[ma, song] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. ; ma, s (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; songma@imr.ac.cn
KeywordNanoparticle Superparamagnetic Property Cryogenic Refrigeration Magnetocaloric Effect Nanocapsule Magnetic-properties Low-field Nanocapsules Gd
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73268
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
J. Li,S. Ma,H. Wang,et al. Enhanced Cryogenic Magnetocaloric Effect Induced by Small Size GdNi5 Nanoparticles[J]. Journal of Materials Science & Technology,2014,30(10):973-978.
APA J. Li.,S. Ma.,H. Wang.,W. J. Gong.,J. J. Jiang.,...&Z. D. Zhang.(2014).Enhanced Cryogenic Magnetocaloric Effect Induced by Small Size GdNi5 Nanoparticles.Journal of Materials Science & Technology,30(10),973-978.
MLA J. Li,et al."Enhanced Cryogenic Magnetocaloric Effect Induced by Small Size GdNi5 Nanoparticles".Journal of Materials Science & Technology 30.10(2014):973-978.
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